Khalīfah al-awwal ʻUbayd Allāh al-Mahdī.
Series: al-Mawsūʻah al-tārīkhīyah lil-khulafāʾ al-Fāṭimīyīn -- no.1
Publisher: Dār al-Jīl
Published: 1980
Place of publication: Bayrūt
Language: ara
Number of pages: 134
Subjects: Mahdī ʻUbayd Allāh, -- Fatimid Caliph, -- 872 (ca.)-934.